Update README for using SSL

README.md

@@ -29,7 +29,7 @@ func main() {
 		GroupFilter: "(memberUid=%s)",
 		Attributes:   []string{"givenName", "sn", "mail", "uid"},
 	}
-	# It is the responsibility of the caller to close the connection
+	// It is the responsibility of the caller to close the connection
 	defer client.Close()
 
 	ok, user, err := client.Authenticate("username", "password")
@@ -49,6 +49,11 @@ func main() {
 }
 ```
 
+## SSL (ldaps)
+
+If you use SSL, you will need to pass the server name for certificate verification
+or skip domain name verification e.g.`client.ServerName = "ldap.example.com"`.
+
 # Why?
 
 There are already [tons](https://godoc.org/?q=ldap) of ldap libraries for `golang` but most of them